Pope, my DH has very few sperm, technically none- they are badly formed, short lived, terrible swimmers and we were not viable for any assisted reproductive technology. We were refused IVF and ICSI.
We were offered IUI with donated Danish sperm, and we turned it down.
I was 33, and after having an ovarian scan which showed an egg being released we did the deed as a last ditch attempt, and got pregnant against all the odds.
Don't lose hope. My DH doesn't feel his masculinity is wrapped up in his sperm numbers, just like I don't feel defined by my egg release capacity. It is a stressful diagnosis but doesn't have to be defining.
Life is for living, not thinking about what could have been. Honestly, after three years of TTCing and fretting over temperatures, ewcm, timed sex, loose underwear, ice baths, multi vitamins, tests and diagnoses, we had given up on the idea of being parents. I was beginning to like the idea of just being a couple!
Good luck to you both: don't forget to have sex just for pleasure!